The effect of ultrasonic irradiation, time and concentration on morphology of novel nano Hg (II) metal-organic coordinationpolymer

Coordination compounds or metal-organic hybrid materials remarkably have attracted huge and unabated attention because of their properties[1-3] .A sonochemical method was used to prepare nano-rods of a novel mercury(II) metal-organic coordination polymer, [Hg(1,10-phen)Cl2]n (1) ( 1,10-phen = 1,10-phenanthroline). The effect of the synthesis parameters such as time, concentrations and irradiation power has been studied and optimized. Nano rods and nano flowers morphologies were obtained by applying diverse sonication time, power and concentration. The compounds were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), elemental analysis, IR spectroscopy, X-ray powder diffraction (XRD), and single crystal X-ray analysis. The X-ray structure analysis revealed that the Hg (II) atom is coordinated by two nitrogen atoms of the 1,10-phen ligand and four chloride bridging atoms with a HgN2Cl4 donor set with symmetrical octahedral geometry. The crystal forms a one-dimensional zig-zag polymer. The adjacent chains connected by π―π of adjacent aromatic rings of 1, 10-phen and other weak interactions. Hence, the weak interactions also allow the 1D zig-zag structure to form a 3D metal-organic coordination polymer. HgO nanoparticles were prepared by thermolysis of compound 1 at 180 °C with oleic acid as a surfactant. The morphology and size of the as-synthesized HgO nanoparticles were further examined using SEM.